Improved metallic screw-cap for jars



J. K. CHASE. Preserving Jar Cap.

Patented Oct. 27,1857.

lnventon AM. PHOTO-LITHQCOJfX. (DSEORNE'S PROCESS.)

UNITED STATES PATENT OFFICE.

JOHN K. CHASE, OF NEW YORK, N. Y.

IMPROVED METALLIC SCREW-CAP FOR JARS,,&O.

Specification forming part of Letters Patent No. [8,498, dated October 27, 1857.

being had to the following figures of the drawings.

Figure 1 is a view of the cap. Fig. 2 is a section. Fig. 3 is the chuck on which said caps are made.

My improvement consists in forming a thin elastic screw-cap out of a solid piece of sheet metal, by spinning up the same out of a single plate without casting, chasing, or swaging, as has heretofore been done, by which I obtain a cap without joint, seam, or flaw, for covering glass, metal, or earthen cans or jars, the elasticity of the screw serving to fit the unequal threads thereon, and the seamless cap insuring tight joints.

secure by Letters Patent, is

A screw-cap for bottles. jars, or cans, 850., formed out of a single solid plate of metal by spinning the same over a threaded chuck or former, as above specified, and for the purposes set forth.

JOHN K. CHASE. Witnesses:

J OHN J. 1VIALCKE, WM. H. STANSBURY.

Having thus set forth my improved article of manufacture, what I claim, and desire to 

